Question

if -1 is a zero of to the polynomial p(x)=kxsquare-4x+k then what is value of k?​

Answer 1

Step-by-step explanation:

-1 is zero of polynomial then

$p( - 1) = { - k}^{2} - 4( - 1) + k$

$= {k}^{2} + 4 + k$

${k}^{2} + k = - 4$

$(k + 1) = \frac{ - 4}{k}$